From 0130899b3b76b48cfc0d396dcddc9bfc463c692f Mon Sep 17 00:00:00 2001
From: tg-mw <81423559+tg-mw@users.noreply.github.com>
Date: Mon, 4 Aug 2025 18:42:39 +0200
Subject: [PATCH] Fix Melopero RV3028 RTC Settings (#7524)

---
 src/detect/ScanI2CTwoWire.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/detect/ScanI2CTwoWire.cpp b/src/detect/ScanI2CTwoWire.cpp
index 652d50d51..8b3670cd9 100644
--- a/src/detect/ScanI2CTwoWire.cpp
+++ b/src/detect/ScanI2CTwoWire.cpp
@@ -184,8 +184,13 @@ void ScanI2CTwoWire::scanPort(I2CPort port, uint8_t *address, uint8_t asize)
                 type = RTC_RV3028;
                 logFoundDevice("RV3028", (uint8_t)addr.address);
                 rtc.initI2C(*i2cBus);
-                rtc.writeToRegister(0x35, 0x07); // no Clkout
-                rtc.writeToRegister(0x37, 0xB4);
+                // Update RTC EEPROM settings, if necessary
+                if (rtc.readEEPROMRegister(0x35) != 0x07) {
+                    rtc.writeEEPROMRegister(0x35, 0x07); // no Clkout
+                }
+                if (rtc.readEEPROMRegister(0x37) != 0xB4) {
+                    rtc.writeEEPROMRegister(0x37, 0xB4);
+                }
                 break;
 #endif